Method of and apparatus for recovering the heat of slags.



C. SEMMLER.

METHOD OF AND APPARATUS FOR RECOVERING THE HEAT 0F SLAGS.

APPLICATION FILED DEC. 9. 1913.

3 SHEETS-SHEET I.

Patented July 20, 1915.

J N. w n f w COLUMBIA PLANDURAPH C0.,\VASHINGTON. D. c.

C. SEMMLER- METHOD OF AND APPARATUS FQR RECOVERING THE HEAT 0F SLAGS.

APPLICATION FILED DEC.9, 1913. 1,146,962. Patented July 20, 1915.

3 SHEETS-SHEET 2.

COLUMBIA PLANOGRAPH c0.,wAsNlNu'roN, n. c.

C. SEMMLER.

METHOD OF AND APPARATUS FOR RECOVERING THE HEAT 0F SLAGS.

APPLICATION FILED DEC. 9, I9I3.

lIlI. II IIIIII cARnsnMMLER; 0F WIESBAIDEN, GERMANY.

METHOD or AND'APPARATUS FOR ano'ovnarne THE HEAT or sLAes.

To all whomit may concern:

' Be it known that I, CARL SEMMLER, a citizen of the German Empire, residing at W'iesb'aden, Germany, have invented new and useful Improvements in the Method of and Apparatus for Recovering the. Heat of Slags, of which the following is a specification. i

This inventionrelatesto a novel method of and apparatus for utilizing the heat of the slag and similar lay-products resulting from the smelting of ore.- 'With the methods hitherto known, itwas attempted to recover the heat of thehot fluid slag by introducing the same into water so as. to heat the latter and to thus generate steam. 'These'm'ethods are utterly'unfeasible on account of the acid produced, while furthermore a continuous process is hardly possible. It has also been proposed to convey the slag as long as it'is in a liquid state, through funnel-shaped channels of a special boiler so as to transmit its heat to the latter, but this process also did not furnish any-favorable results.

According to the present invention, relatively smalljacketed slagcontainers or pockets are provided between the double walls of which a suitable heat carrying medium such as distilled water is made to circulate. This medium takes'up the heat and transmits the same to an accumula tor, in which steam generation takes place.

In this way, a quick transmission of heat and a comparatively great drop in temperature between the slag cake and the heat carrier is rendered possible, which in turn results in a withd'rawalof the heat from the interior of said cakei As heat carrier, distilled water or similar liquids which are not liable to permit the segregation of solid particles warrant a continuous operation, owing to the absence of incrustations within the jackets, etc. I i

In the accompanyin'g drawing: Figure 1 illustrates diagrammatically my improved apparatus, showing a single slag pocket; Fig. 2'is asimila'r diagrammatic view showing a plurality ofslagpockets; Fig. 3is a side view of one of the slag pockets; Fig. 3 isa cross section thereof, '3 a modified form; Fig. 4 shows a slag pocket laid out in a plane, Fig. 5 illustrates a modified form of the pocket; Fig. 6 is a cross section through a stationary slag pocket; Fig. 7 is afront view, partly in section, thereof; Fig. 8 shows an arrangement of a plurality of sta- Specification of Letters Patent.

Application filed-December 9,1913.

Patented July 20, 1915. Serial No. 805,532.

tionary slag pockets in front of a blast furmice, and Fig. 9 is a cross section of Fig. 8.

It may here be stated that in the several figures, the conduits for the cold heat car rier, the heated carrier and steam are respectively indicated by full, dotted and dot and dash lines.

In Fig. 1 the letter (2/, indicates a slag pocket which is preferably composed of a jacketed container 7) provided with a fire proof lining 0." Near its bottom, the jacket 6 of container 5 is, by pipe 7 connected with the lower section of a reservoir or heat accumulator h,while a pipe connects the upper section ofsaid reservoir with the top of jacket 6 Reservoir ficonta'ins a heat carrier (Z such as chemically pure water, 2'. 6.

water which is not apt to permit the formation of any deposits, said carrier being forced through jacket 6 by means of a pump 7 with such a speed and under such a pressure as to prevent the generation of steam within said jacket. For this purpose a check valve 9 is preferably provided for pipe 9, which may be coupled to the speed regulating means of pump 7 if so desired. It will be seen that the heat carrier cl takes up considerable heat while passing jacket 6 and that, after leaving valve 9 its pressure is suddenly relieved, thus causing a lively generation of steam which may be utilized in suitable manner. As shown in Fig. 1, this steam is conducted through pipe 27 to an engine, radiator or other steam consuming apparatus 7c, the condensates of which are by pump Z returned to pipe f, thus forming a complete cycle of the heat carrier. In lieu of directly utilizing the heat of said carrier, a second cycle may beestablished, which is controlled by the heat generated within accumulator k, such an arrangement being illustrated in Fig. 2.

The letters m designate a pair of blast furnaces, in front of which there is arranged a plurality of traveling slag'pockets a. The accumulator h, heated by the carrier d that flows through the jackets of the slag pockets a, transmits its heat to a boiler n. The latter contains a vapor, for instance the cold vapor of sulfurous acid, which after being heated will circulate through the parts 2', 70, Z, to produce the results desired.

The slag pockets are preferably made in the form of comparatively small and high recepta oles thereby forming narrow passages for the heat carrying medium, as illustrated in Figs. 3 to 5. Here the pocket is composed of two spaced nested sheet metal troughs o and p, which are connected along their edges in suitable manner. Within the jacket thus formed, there is arranged a plupockets that would lead either to explosions or to an overheating of troughs 0. The end walls 25 are made removable and consist preferably of sheet metal plates lined with chamotte. These end walls are provided with inwardly projecting protuberances M) which penetrate into the solidified slag cake. The slag pockets Figs. 3 and 3 canbe fitted with inner pockets 0 0 for the heat carrying medium as illustrated in Fig.3.

With stationary slag pockets, there is arranged intermediate each pair of adjoining pockets, a wedge-shaped cross bar w, adapted to engage correspondingly" chamfered lugs y projecting outward from end walls 25 near thebottom thereof, said cross bars holding the end walls in engagement with the slag cakes. At their top, the end walls are held in proper position by wedges 2, which are raised when lifting the slag cakes out of the pockets by means of the side walls t. The slag pockets may be made movable, but it is preferred to arrange them stationary in front of the blast furnaces, whereby the flowing slag is conducted to said pockets by suitable movable or stationary channels, the flow of the slag into the several pockets being controlled by plugs adapted to be inserted into said channels.

Fig. 6 illustrates a stationary slag pocket which is embedded within a suitable heat insulating material in front of the slag channel. The pocket may be closed by a heat insulating lid u. r After the liquid slag introduced into the pocket has given off its heat to the heat carrier, and after the slag has thus become solidified, the'resulting cake is lifted by means of the end walls out of the pockets, to be conveyed to the slag mounds. For this purpose, there is arranged above the several pockets a conveying device 0). By suitable means (not shown) walls t may then be spread to loosen the slag cakes and permit the same to drop upon the mound.

I claim:

' 1. Method of recovering the heat of fresh fluid slag which consists in introducing the slag into a jacketed pocket, and passing a fluid heat-carrying medium through the pocket-jacket under a pressure which causes the slag to heat'said medium to a temperature lying above its boiling point while eX- eluding vaporization of said medium.

2. Method of recovering the heat of fresh I .fluid slag which consists in introducing the slag into a jacketed pocket, passing a heatcarrying medium through the pocket-jacket under a pressure which causes the slag to heat said medium to a temperature lying above its boiling point while excluding vaporization of said medium, and relieving the pressure of the medium subsequent to its passage through said pocket, thereby causing vaporization of said medium.

3. A device for recovering the heat of fresh fluid slag, comprising a plurality of stationary jacketed slag pockets, a heat accumulator containing a liquid heat-carrying medium, stationary pipes connecting the pockets with said accumulator, and means for forcing the heat-carrying medium from the accumulator through the pocket-jackets under a pressure that prevents vaporization of said medium.

4. A device for recovering the heat of fresh fluid slag, comprising a plurality of stationary jacketed slag-pockets, reinforcing ribs within the pocket-jackets, a heat accumulator containing a liquid heat-carrying medium, stationary pipes connecting the pockets with said accumulator, and means for forcing the heat-carrying medium from the accumulator through the pocket-jackets under a pressure thatprevents vaporization of said medlum. a

5. A device forrecovermg the heat of fresh fluid slag, comprising a plurality of stationary pockets composed of jacketed troughs and end walls removably engaging said troughs, a heat. accumulator communicating with the-trough-jackets, and means for sending a heat-carrying medium. from the accumulator through said jackets under a pressure that prevents vaporization of said medium within said 'jackets.

6. A device for recovering the heat of fresh fluid slag, comprising a plurality of stationary pockets composed of jacketed troughs and end walls removably engaging said troughs, protuberances extending inwardly from said walls into engagement with the resulting -slag cakes, means for removing thetwalls together with said cakes from the troughs, a heat accumulator communicating with the -trough-jackets, and means for sending a heatcarrying medium from the accumulator through said jackets under a pressure that prevents vaporization of said medium within said jackets.

7. A device for recovering the heat of fresh fluid slag, comprising a plurality of stationary pockets composed of jacketed troughs and end walls removably engaging said troughs, a heat accumulator communieating With the trough-jackets, and means for sending a heat carrying medium through said jackets and accumulator.

8. A device for recovering the heat of fresh fluid slag, comprising a plurality of stationary pockets composed of jacketed troughs and end Walls removably engaging said troughs, protuberances extending inwardly from said Walls into engagement With the resulting slag cakes, means for removing the Walls together With said cakes from the troughs, a heat accumulator communicating With the trough-jackets, and means for sending a heat carrying medium through said jackets and accumulator.

9. Method of recovering the heat of fresh fluid slag Which consists in introducing the slag into a jacketed pocket, passing a heatcarrying medium along a predetermined path through the pocket-jacket under a pressure Which causes the slag to heat said medium to a temperature lying above its boiling point While excluding vaporization of said medium, and relieving the pressure of the medium subsequent to its passage through said pocket, thereby causing vaporization of said medium.

CARL SEMMLER.

Witnesses WOLDEMAR HAUPT, HENRY HASPER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

